We all know how a tough workout is more effective than one that is easy.
It is easier to read a storybook than a non-fiction book. It is easier to read non-fiction than a textbook. It is easier to read a text book than an academic paper. Yet, a good academic paper can often be the most effective way to learn about a new topic.
In the world of fitness, we are open to choosing a tough workout regimen. With learning as well, it helps to hit the gym and pump weights once in a while.